A man in a helmet breaks into a pharmacy, kills the staff, and departs with drugs. When the MWSPB arrives on the scene, they find his Crime Coefficient was not high enough to set off the alarm. The same man attacks a woman in public, brutally beating her to death with a hammer in front of a crowd and a Psycho-Pass scanner. Later, the team learn that more culprits, wearing the same helmets, rob an armored car. Kogami deduces that the second crime would have a motive, leading their investigation to a man named Jyunmei Itoh who had a grudge against the victim. As Itoh attempts to escape, Kogami deduces that the helmets copy the low Crime Coefficients of innocent bystanders, thus help criminals avoid apprehension. With Akane and Masaoka's help, he apprehends the murderer.